It looks like the Javascript is clashing with something you've already got on your boards. This is the error I'm getting when I try it on your boards on IE:
The only thing I can think of is in headinclude, to replace this:
Code:
window.sidebar.addPanel(title, url, "")
with this:
Code:
window.sidebar.addPanel(title, url, "");
(The only difference between the two lines is the semi-colon at the end. I noticed this before posting the hack, but this was how the DynamicDrive function was originally written, and it didn't cause any problems on my boards that way.)
Hack updated to include this change.